XPS spectra of Br 3d core levels. The dark curve is the original data and the orange asterisk is the superposition of fitted peaks. Peaks are indicated for bromine in unattached PbBr2 (blue circles) and bromine in PbBr2 (green triangles).
Heo et al. Nanoscale Research Letters 2013 8:488 doi:10.1186/1556-276X-8-488